﻿/*   
    Copyright (C) 2009 Galaktika Corporation ZAO

    This file is a part of Galaktika.BusinessMonitor
 
    Galaktika.BusinessMonitor is a free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
      
    You should have received a copy of the GNU General Public License
    along with Galaktika.BusinessMonitor.  If not, see <http://www.gnu.org/licenses/>.
  
    If GPL v.3 is not suitable for your products or company,
    Galaktika Corp provides Galaktika.BusinessMonitor under a flexible commercial license
    designed to meet your specific usage and distribution requirements.
    If you have already obtained a commercial license from Galaktika Corp,
    you can use this file under those license terms.
*/

using System;
using System.Collections.Generic;
using System.IO;
using System.Xml;

namespace Galaktika.BI.Silverlight.ClientApp
{
    public static class LayoutParser
    {
        public static LayoutContainer Parse(string xml)
        {
            LayoutContainer lc = new LayoutContainer();

            // HACK: добавляем whitespace между узлами
            xml = xml.Replace("><", ">\r\n<");
            using (XmlReader xr = XmlReader.Create(new StringReader(xml)))
            {
                Stack<LayoutItemBase> items = new Stack<LayoutItemBase>();

                while (xr.Read())
                {
                    switch (xr.NodeType)
                    {
                        case XmlNodeType.Element:
                            if (xr.IsEmptyElement)
                            {
                                break;
                            }
                            switch (xr.Name)
                            {
                                case "property":
                                    {
                                        if (xr.MoveToAttribute("name"))
                                        {
                                            string name = xr.Value;
                                            if (name == "Items")
                                            {
                                                break;
                                            }
                                            else
                                            {
                                                if (name.StartsWith("Item", StringComparison.CurrentCultureIgnoreCase))
                                                {
                                                    LayoutItemBase item = new LayoutItemBase(name);
                                                    lc.Items.Add(item);
                                                    items.Push(item);
                                                }
                                                else
                                                {
                                                    if (items.Count > 0)
                                                    {
                                                        if (xr.MoveToContent() == XmlNodeType.Element)
                                                        {
                                                            items.Peek().Properties.Add(name, xr.ReadInnerXml());
                                                        }
                                                    }
                                                }
                                            }
                                        }
                                    }
                                    break;
                                default:
                                    break;
                            }
                            break;
                        case XmlNodeType.EndElement:
                            // Вызывается так же для всякой шняги типа LookAndFeel
                            if (items.Count > 0)
                            {
                                items.Pop();
                            }
                            break;
                        default:
                            break;
                    }
                }
            }

            return lc;
        }
    }
}
